从以下词典查找:
历史:
高考 CET-4 CET-6 考研 TOEFL IELTS BNC: 4841 COCA: 3896

laser

noun
/ˈleɪzə(r)/
/ˈleɪzər/
jump to other results
  1. a device that gives out light in which all the waves oscillate (= change direction and strength) together, typically producing a powerful beam of light that can be used for cutting metal, in medical operations, etc.激光器
    • a laser beam激光束
    • a laser navigation device激光导航装置
    • The barcodes on the products are read by lasers.产品上的条码是用激光读取的。
    • a laser show (= lasers used as entertainment)激光表演
    • She's had laser surgery on her eye.她做了眼部激光手术。
    • laser treatment/therapy激光治疗
    Topics Physics and chemistryc1
    Oxford Collocations Dictionaryadjective
    • powerful
    • infrared
    verb + laser
    • use
    • aim
    • fire
    laser + noun
    • beam
    • blast
    • light
    See full entry
    Word Origin1960s: acronym from light amplification by stimulated emission of radiation, on the pattern of maser.

© Copyright 2018